What is ASX File Extension?


ASX stands for Advanced Stream Redirector. It is an XML type of file which aims to store the data of Windows media files. The file extension is targeted to ASF formatted file type and holds all the details of Windows media player. If you are using the player, check out its file extension. It will be displayed as .asx.


The file extension comes under Microsoft ASF Redirector File category.

Supporting Apps

  • Microsoft Windows Media Player
  • VideoLAN VLC Media Player
  • Nullsoft Winamp


  • video/x-ms-asf
  • application/ms-asx
  • application/ms-asx-plugin
  • application/asx


The file extension is taken care by the tech giant Microsoft Corporation.

File Signature


Encoding in .ASX File

It supports Unicode and ANSI encoding

How to View the File Extension

An ASX file can be opened by its supported applications like Windows Media Player.